code: def update_database(self, db_name="default"):
      self.create_database(db_name=db_name)
      self.collection_client.db_name = db_name
      self.vector_client.db_name = db_name
  
file_path: milvus/tests/restful_client/base/testbase.py
imports: import json
  import sys
  import pytest
  import time
  from pymilvus import connections, db
  from utils.util_log import test_log
  from api.milvus import VectorClient, CollectionClient
  from utils.utils import get_data_by_payload
label_desc: Use image node_id 6 for calling the TestBase obj's underlying member method code with example usage: obj.update_database(db_name) without return types